This essay discusses various theories, principles, and models in education and teaching, emphasizing effective communication methods. It covers verbal and non-verbal communication, highlighting the importance of clear and accessible language in schools. The essay explores communication theories such as the Semiotics school and the Process school, along with principles that ensure students understand the content. Several communication models are examined, including Aristotle's model, Lasswell's model, Shannon and Weaver's model, Charles E. Osgood's model, and David Berlo's model, each offering unique insights into enhancing the learning experience. The essay concludes by underscoring the need for a healthy learning environment, understanding students' abilities, and adopting inclusive techniques and model-based learning methods, with examples like using abacus for teaching maths to primary grade students.